docs: def last_written_resolver(riak_object):
      """
      A conflict-resolution function that resolves by selecting the most
      recently-modified sibling by timestamp.
  
      :param riak_object: an object-in-conflict that will be resolved
      :type riak_object: :class:`RiakObject <riak.riak_object.RiakObject>`
      """
      riak_object.siblings = [max(riak_object.siblings,
                                  key=lambda x: x.last_modified), ]